The watch I was a Sub-Guardian of has disappeared from my list of watches?

As a Safety feature, when the Master Guardian deletes the watch from their list, the watch is deleted from all sub-guardians lists. This ensures that no sub-guardians remain connected to a watch when you may be providing the watch to a new wearer. This also allows a new person become the Mater Guardian and let people become a sub-guardian with approval of the new Master Guardian